Adult students taking a dimensional metrology course usually do so to fulfill a need for their present employment, advancement, or expected employment. In order to assure that the quality of training is maintained it has become necessary to investigate alternatives to existing instructional approaches whereby the contents of the course can be within the existing number of classroom hours. The purpose of this research was to compare the time difference between use of metric and customary measurement instruments by adults trained in the use of both measuring systems. The methodology included measuring industrial parts by two measuring instruments commonly used in industry. Sample questions, standard deviations, and t-test calculations are appended. (KR)